PartsTable
Technical Data Sheet
PartsTable / O-RING / 3921938
3921938 ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The O-RING is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-423-4043, indicating validated use in U.S.

government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
3921938
NSN: 5331-01-423-4043
FSC: 5331 — O-RING
CAGE: 0CTH1 — CUMMINS POWER SYSTEMS, LLC DBA CUMMINS (USA)
SPECIFICATIONS
Part Number3921938
NSN5331-01-423-4043
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 3921938 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
2-300-158-01Interchangeable
interchangeable cross-reference
interchangeable
5-133V747-75Interchangeable
interchangeable cross-reference
interchangeable
31332Interchangeable
interchangeable cross-reference
interchangeable
32-31465 ITEM 15Interchangeable
interchangeable cross-reference
interchangeable
LK1352-6LE64PInterchangeable
interchangeable cross-reference
interchangeable
60-13074Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3921938?
3921938 is a O-RING.
What parts can replace 3921938?
There are 11 known substitutes for 3921938: 2-300-158-01, 5-133V747-75, 31332 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3921938?
3921938 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-423-4043. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026